Mikagura Gakuen Kumikyoku (TV)

Synopsis

After learning about how students can use special abilities during club battles, in which student's must destroy all three of their opponent's crystals, Eruna pays a visit to each of the different clubs, learning about the various abilities the representatives have. However, Eruna struggles to come up with her own special ability by the time of her match, in which she must battle against Himi. As Eruna quickly finds herself on the defensive and goes into hiding, she comes across a sealed room and briefly sees a mysterious woman, who tells her that she has already possesses a power inside her. When she regains her senses, Eruna discovers she now possesses super speed and a finger laser ability called "Toy Gun", which she uses to destroy all of Himi's crystals in one go and win the match.

(Source: Wikipedia)